Refactor
Refactor
Refactor
Refactor
Refactor
Refactor

* Fix spelling "defence" -> "defense"
Fix bugs

* Fix bug that equipment tags disappear randomly
* Fix bug that a JavaScript error occurs when finished hourly encounters
Change to reuse the style element that is previously added when adding
new styles
Add new option "Reverse skill traversal order" that is sub option of "Enable Weapon Skill Hotkeys"